... as, coal powder, charcoal powder, metallic powder (Fe / Si powder), iron scale, iron sludge, precipitator dust, iron concentrate, the ... oxide, carbon powder, charcoal powder, slag, gypsum, tailings, sewage sludge, kaolin, activated carbon, coke powder and other powder, powder, waste, ... Tremendous pressure between the two roller, the powder become finished product. Structural principleThis series of ...